package com.emm.yixun.openapi.filter;

import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 解决跨域问题
 * @author suhong
 * @version V1.0
 * @Title: M2
 * @Package com.emm.yixun
 * @Description:
 * @date 2019/07/29 15:42
 */
public class CorsFilter implements Filter {

    /*
     * @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
     */
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    /*
     * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest,
     * javax.servlet.ServletResponse, javax.servlet.FilterChain)
     */
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        HttpServletResponse httpServletResponse = (HttpServletResponse) response;
        httpServletResponse.setHeader("Access-Control-Allow-Origin", "*");
        httpServletResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        httpServletResponse.setHeader("Access-Control-Max-Age", "3600");
        httpServletResponse.setHeader("Access-Control-Allow-Headers",
                "Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With");
        httpServletResponse.setHeader("Access-Control-Allow-Credentials", "true");// 允许cookie
        chain.doFilter(request, response);
    }

    /*
     * @see javax.servlet.Filter#destroy()
     */
    public void destroy() {

    }

}